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R. PARKER. MANUPAGTURE 0P LONGITUDINALLY FOLDED TUBES.

No. 352,656. 4 Patented Nov. 16, 1886.

- w k g? ihsrrno STATES ATENT RUSSELL PARKER, O BROOKLYN, N. Y., ASSIGNOR TO HIMSELF, JAMES H. STEARNS, AND BENJAMIN F. SUTTON, ALL OE SAME PLACE.

MANUFACTURE OF LONGlTUDlNALLY-FOLDED TUBES.

- SPECIFICATION forming part of Letters Patent No. 352,656Tdated November 16, 1886.

Application iilcdJun'e 12, 1886.

To all. whom it may concern.-

Be it known that I, RUSSELL PARKER, of the city of Brooklyn, in the county of Kings and Stateof New York, have invented a new 5 and useful Improvement in the Manufacture of Longitudinally Folded or Collapsed Tubes, 2 ofwhich the following is a specification. i In United States Letters Patent NO. 319,937, 5 granted June- 9, 1885, to Benjamin F. Sutton,

- ml is shown and described asyringe tube ol'indiairubber which in its normal condition is collapsed in longitudinal folds or corrugations, and which, by the collapsible or contractile itendency that it has when expanded by press- I5jure of water within it, serves to produce a nearly-continuous discharge. The object of my invent-ion is to provide a method whereby tubes of the character above described for syringes and other purposes may 20 be uniformly, quickly, and cheaply folded or collapsed after they are produced in cylindric or-other simple shape of vu'lcanizable indiarubber or analogous material, and before they are subjected to heat or other treatment which 25 will permanently fix their shape.

My invention is a method of making longitudinally folded or collapsed or corrugated tubes, consisting in first producing a tube of simple form of vulcanizable india-rubber or 30 other analogous compound or material, and in then subjecting it to pressure on opposite sides while preventing its expansion in a direction "transverse to the lineof pressure.

In the accompanying drawings, Figure. l

5 represents a piece of tube of simple form, and Fig. 2 represents the same tube after being collapsed in longitudinal folds according to my improved method. Fig. 3 is a perspective view ofa mold, consisting of a box and a presser '40 or follower, whereby my method may be carried out; and Figs. 4, 5, and 6 are transverse sections of the mold and a tube, illustrating the change of form which the tube undergoes by the actionof the presser or follower upon it.

Similar letters of reference designate corresponding parts in all the figures.

Themold here represented for carrying out my invention consists of a box or bed-piece,

A, having in it a channel or groove, 1), with 1 5o upright parallel side walls, I), and a presser or Serial No. 205.025. |Spccimens.l

follower, B, having upon its under side a rib or flange, I), which is of a size to fill the channel or groove'b, and yet small enough to pass readily downward thereinto. These two parts may be of cast-iron or other suitable material. 5

As here shown, the bottom of the channel or groove b and the bottom or under side of the rib or flange b are slightly raiser. at the...

center, or, in other words, have their surfaces composed of two slight coneaves meeting in a ridge or projection, b Such a construction is not essential to my invention, but is useful, for a reason hereinafter described.

In carrying out my invention I first produce in any well-known and suitable manner a tube,

0, of simple form-cylindric, for exampleas shown in Fig. 1, and of a vulcanizable compound of india-rubber or other material which will readily assume a different form, which it will retain after being vulcanized or subjected to other suitable treatment, according to its character. 1 then place the tube 0 in the channel b of the box A, and by forcing the presser or follower B down upon it the tube is subjected to pressure on opposite sides while it is confined by the walls b, and prevented from expanding'in a direction transverse to the line of pressure. As the pressure is applied the tube 0 first takes an approximately square or rectangular form, as shown in Fig. 5, and the continuance of the pressure causes the opposite sides to fold inward laterally and between the underlying and overlying folds, which are in contact with the bottom of the channel bi and rib or flange b", until the tube 0 is brought to desired shape shown in Figs. 2 and 6. The

follower or presscrB may then be secured by clamps and the tube subjected in the mold to the heat necessary for vulcanization; or the tube may be removed from the mold and vulthe follower or presser might have a corresponding number of projecting ribs or flanges b", so as to operate on a large number of tubes at once.

What I claim as my invention, and desire to secure by Letters Patent, is

escribed of making a collapsed tube, cona tube ofsimple form The method herein d Iongitudinally folded or sisting in first'produeing of vulcanizable indie-rubber or analogous ma- 1o terial, and in then subjecting it to pressure on opposite sides while preventing its expansion in a direction transverse to the line of pressure, substantially as herein set forth.

RUSSELL PARKER.

FREDK. HAYNES,

\Vit n esses:

EMIL HERTER. 

